Mechanism for operating elevator-doors.



Nd. 642,098. Patented Jan. 30, 1900; F. K. FASSETT.

MECHANISM FOR OPERATING ELEVATOR DOORS.

(Application filed July 22, 1899.) (N em 2 Sheets-Sheet l.

ATENT rFIcE.

FRANCIS K. FASSETT, OF ST. LOUIS, MISSOURI, ASSIGNOR, BY MESNE ASSIGN- MENTS, TO THE IVINSLOW' BROTHERS COMPANY, OF CHICAGO, ILLINOIS.

MECHANISM FOR OPERATlNG ELEVATOR-DOORS.

SPECIFICATION forming part of Letters Patent No. 642,098, dated January 30, 1900.

Application filed July 22,1899.

To all whom it may concern.-

Be it known that I, FRANCIS K. FASSETT, a citizen of the United States, residing at the city of St. Louis, State of Missouri, have invented a certain new and useful Improvement in Elevator-Door-Operating Mechanism, of which the following is a full, clear, and exact description, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, forming part of this specification, in which Figure 1 is a detail view, in side elevation, of my improved elevator-door-operating mechanism, showing the doors in their closed position. Fig. 2 is a similar view showing the doors partly open. Fig. 3 is a similar view showing the doors fully open. Fig. 4 is a sec tional view on line i 4: of Fig. 1. Fig. 5 is an enlarged side elevational view of the upper portion of the doors. Fig. 6 is an enlarged view in perspective, showing the door-operating mechanism. Fig. 7 is a side elevational view of four doors which may be opened by single operating mechanism. Fig. 8 is a sectional view of the four-door arrangement; and Figs. 9 and 10 are detail views, in side elevation and plan, respectively, of a portion of a door and one of its hangers, showing a slight modification wherein I utilize said hanger as a supporting means for the cable-sheave which is employed in carrying out my invention.

This invention relates to a new and useful improvement in elevator-door-operating mechanism, the object being to obtain a wider passage-way than is usual with devices now in general use. Where a wide doorway is provided, the elevator can be entered and filled more rapidly than with a narrow passage.

The invention is particularly applicable to elevators in which it is desired to have a doorway greater than can be obtained where a single door is used.

By the improved mechanism hereinafter shown and described at least two-thirds of the front of the elevator can be opened for the ingress and egress of passengers and freight to and from the elevator, or where a small space is provided to receive the doors when open the entire width of the cage may be rendered Serial No. 724,752. (No model.)

available for the reception and discharge of its load.

With these objects in View the invention consists in the construction, arrangement, and combination of the several parts, all as will hereinafter be described and afterward pointed out in the claims.

In Fig. 5 I have shown an approved track and hanger arrangement for the doors; but it is obvious that other forms can be employed without departing from the nature and prin ciple of my invention.

A indicates a suitable support forming part of the casing for the elevator-shaft, B a channel-beam, and O a track-hanger of inverted -T shape in cross-section, on each horizontal member or web of which is arranged a track D for receiving the hangers E of what I will term the double doors. These double doors (marked 1 and 2) are designed to slide partially past each other in their movement, one having a greater movement than the other. For the sake of convenience I will say that the door 1 is the inside door and the door 2 the outside door. Door 2 is provided with brackets 3 and 4 on its two edges, which brackets support sheaves or pulleys 5 and 6, respectively.

7 indicates a cord, chain, or other flexible device which is secured to the under side of the track-supports at a point marked 8, which is beyond the extreme inward movement of the doors. This flexible chain or cord passes freely around the sheave 5 and is then fixed to a lug or projection 9 on the door 1, whence it passes inwardly around sheave or pulley 6 and up to a fixed projection or point of attachment 10 on the under side of the track-support. Power being imparted to either of the doors, as in the opening movement, will cause said doors to move inwardly, the door 1 traveling at a greater speed and moving practically twice the distance of the door 2, so that in their full open position the doors will be arranged practically side by side, as shown 5 in Fig. 3.

When power is imparted to door 1 to open the same, the cord 7 by reason of its attachment to the door 1 and to the track-support at the points 8 and 10 will pull the door 2 in the same direction by the engagement of said cord with sheave 5, the sheave 6 taking up the slack of the cord between the point of attachment 10 and the bracket 9. The door 2 moves at half the speed and half the distance of door 1 until the two doors occupy positions opposite each other, as shown in Fig. 3. When the doors are closed-say the power is imparted to door 1 in the closing 1novement the pull from point 9 and door 1 will cause the flexible cord or chain 7, passing around sheave 6 and secured to fixed point 10, to move the door 2 at half the speed of door 1 until a closure is eflected. Point 9 being the medial point, the flexible cord 7 on each side thereof will cooperate with the pulleys 5 and 6 and fixed points 8 and 10, the former in opening the doors and the latter in closing the doors, each of said pulleys and fixed points 8 and 10, respectively, when not actively operative serving to passively take up the slack of the other side of the flexible cord.

In Fig. 7 I have shown an arrangement wherein two pairs of op positely-movable doors are provided to effect a closure to the cage, said pairs of doors and their sheave arrangements being the same in all respects as that heretofore described for the single pair of doors. In order to utilize the power imparted to either one of apair of doors, so that the oppositely-movable pair will be likewise operated, I provide two fixed sheaves 11 on the track-supports, around which passes a cord 12, said cord being connected on one side of said sheaves, as at 13, to one of a pair of doors and on the other side of said sheaves to another of the opposite pair of doors, as at 14:. This cord or chain 12 when power is imparted to one door of a pair will cause the other pair of doors to be moved in an opposite direction either in efli'ecting the opening or closing movement.

In Figs. 9 and 10 I have shown an arrangement wherein the usual door-hangers are employed for supporting the sheaves of pulleys 5 and 6, thereby dispensing with the use of separate brackets 3 and 4. This construction is cheaper to produce than that heretofore described and has also the advantage of being up out of the way and does not when the doors are fully open protrude into the passage-way.

I am aware that minor changes in the arand having its ends fixed to a stationary support, said flexible cord or chain being attached to the other of said slidable sections, whereby, when power is imparted to one of said sections, both sections will move in the same direction at different speeds; substantially as described. 7

2. The combination with an elevator-door composed of slidable sections adapted to partially pass each other in their opening and closing movement, one of said sections being provided with sheaves, of a flexible member passing around said sheaves and having its ends fixed to stationary parts, said flexible member being fixed to said other slidable section; substantially as described.

3. The combination with an elevator-door composed of two pairs of slidable sections, of flexible connections between said pairs. of slidable sections for insuring the simultaneous movement of said two pairs in opposite directions, and means for causing one slidable section of each pair of doors to move at a dif ferent speed from the other section of that pair, when power is applied to either section of the pair to open or close the door; substantially as described.

4;. The combination with an elevator-door composed of four slidable sections arranged in pairs, adapted to move in opposite directions, of sheaves secured near the opposite edges of each inner section of a pair, separate flexible cords or chains which pass around said sheaves and are secured to stationary sup ports, said cord or chain of each pair of sec tions being attached to the other section of the pair at a point between the sheaves of the companion section, stationarily-mounted sheaves, and a flexible cord or chain which passes around said sheaves, and is attached at opposite sides to one of a pair of sections; substantially as described.

5. The combination with two pairs of door-' sections,and mechanism connecting each pair to insure the simultaneous movement of the sections of a pair in the same direction at different speeds, so that one section of a pair will partially pass its companion in the opening or closing movement, and means cooperating with a door-section in each pair, whereby,

when power is applied to either section of one pair to open or close the door, a like movement in the opposite direction will be imparted to the other pair of sections; substantially as described.

6. The combination with an elevator-door composed of slidable sections, of brackethangers secured to the upper edges of said sections, track-rollers mounted in said brackethangers, sheaves'or pulleys mounted in the bracket-hangers of one of said door-sections, and a fiexible' cord or chain passing around said sheaves or pulleys and having its ends fixed to a stationarysupport, said flexible cord or chain being attached to the other of said slidable sections, whereby, when power is imparted to one of said sections, both sections will move in the same direction at different speeds; substantially as described.

7. The combination with a door comprising sliding sections, of a flexible member having fixed ends and attached to one of said doorsections and so arranged over sheaves on the other door-section as to insure a positive and difierential movement of both door-sections in the same direction when power is applied to either section to open or close the door, substantially as described.

8. The combination with a door comprising two pairs of sections, of means for causing the simultaneous movement of said pairs of sections in opposite directions, and means for causing the sections of one pair to move dif- FRANCIS K. FASSETT.

WVitnesses:

WM. H. Soorr, A. S. GRAY. 

